The Feynman iε in string theory

Edward Witten

doi:10.1007/JHEP04(2015)055

The Feynman iε in string theory

Edward Witten

Research output: Contribution to journal › Article › peer-review

62 Scopus citations

Abstract

Abstract: The Feynman iε is an important ingredient in defining perturbative scattering amplitudes in field theory. Here we describe its analog in string theory. Roughly one takes the string worldsheet to have Lorentz signature when a string is going on-shell although it has Euclidean signature generically. (This article is based on a talk presented at the Zuminofest in Berkeley, California, May 2-4, 2013.)

Original language	English (US)
Article number	55
Journal	Journal of High Energy Physics
Volume	2015
Issue number	4
DOIs	https://doi.org/10.1007/JHEP04(2015)055
State	Published - Apr 1 2015
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Keywords

Bosonic Strings
Superstrings and Heterotic Strings

Access to Document

10.1007/JHEP04(2015)055

Cite this

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AB - Abstract: The Feynman iε is an important ingredient in defining perturbative scattering amplitudes in field theory. Here we describe its analog in string theory. Roughly one takes the string worldsheet to have Lorentz signature when a string is going on-shell although it has Euclidean signature generically. (This article is based on a talk presented at the Zuminofest in Berkeley, California, May 2-4, 2013.)

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KW - Superstrings and Heterotic Strings

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The Feynman iε in string theory

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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